Whether it's simply altering data for personal gain or selling mission-critical information to your business competitors, management is challenged to screen-out anyone with a history or predisposition for dishonesty.
The lure of big bucks and babes entices marginal people
It's big business, and I have helped many large corporations choose trustworthy employees and identify posers. I especially like the "web search" background checks.
I remember a case where a job applicant was rejected for something that they did back in 1998 (it was an unprofessional remark in a USENET Newsgroup). In another memorable case, a job candidates was rejected because his Facebook page contained a photo of him holding a "bong" (a marijuana delivery vehicle).
Your Facebook pages can get you disqualified!
Read more about Evaluating computer weenies for acts of moral turpitude